步骤：
1. 理解基数：你需要知道八进制是基于8的数制。这意味着每个位置上的数字可以是从0到7，其中8是最高位。
2. 写出八进制数：将你要转换的八进制数写下来。
3. 找到最右边的数字：在八进制数中，最右边的数字代表的是该数的个位数。例如，八进制数`175`的最右边的数字是`5`。
4. 计算十进制值：将最右边的数字乘以8的相应次方，然后将结果相加。例如，对于八进制数`175`，计算如下：
– `5 8^0 = 5`
– `5 8^1 = 40`
– `5 8^2 = 320`
– `5 8^3 = 2560`
– `5 8^4 = 32000`
– `5 8^5 = 320000`
– `5 8^6 = 3200000`
– `5 8^7 = 32000000`
– `5 8^8 = 320000000`
– `5 8^9 = 3200000000`
– `5 8^10 = 32000000000`
– `5 8^11 = 320000000000`
– `5 8^12 = 3200000000000`
– `5 8^13 = 32000000000000`
– `5 8^14 = 320000000000000`
– `5 8^15 = 3200000000000000`
– `5 8^16 = 32000000000000000`
– `5 8^17 = 320000000000000000`
– `5 8^18 = 3200000000000000000`
– `5 8^19 = 32000000000000000000`
– `5 8^20 = 320000000000000000000`
– `5 8^21 = 3200000000000000000000`
– `5 8^22 = 32000000000000000000000`
– `5 8^23 = 320000000000000000000000`
– `5 8^24 = 3200000000000000000000000`
– `5 8^25 = 32000000000000000000000000`
– `5 8^26 = 32000000000000000000000001`
– `5 8^27 = 320000000000000000000001`
– `5 8^28 = 3200000000000000000001`
– `5 8^29 = 32000000000001`
– `5 8^30 = 321`
– `5 8^31 = 322`
– `5 8^32 = 324`
– `5 8^33 = 326`
– `5 8^34 = 328`
– `5 8^35 = 33`
– `5 8^36 = 34`
– `5 8^37 = 36`
– `5 8^38 = 38`
– `5 8^39 = 42`
– `5 8^40 = 44`
– `5 8^41 = 46`
– `5 8^42 = 48`
– `5 8^43 = 52`
– `5 8^44 = 54`
– `5 8^45 = 56`
– `5 8^46 = 58`
– `5 8^47 = 62`
– `5 8^48 = 64`
– `5 8^49 = 66`
– `5 8^51 = 68`
– `5 8^52 = 72`
– `5 8^53 = 74`
– `5 8^54 = 76`
– `5 8^55 = 78`
– `5 8^56 = 82`
– `5 8^57 = 84`
– `5 8^58 = 86`
– `5 8^59 = 88`
– `5 8^61 = 92`
– `5 8^62 = 94`
– `5 8^63 = 96`
– `5 8^64 = 98`
– `5 8^65 = 112`
– `5 8^66 = 114`
– `5 8^67 = 116`
– `5 8^68 = 118`
– `5 8^69 = 122`
– `5 8^71 = 124`
– `5 8^72 = 126`
– `5 8^73 = 128`
– `5 8^74 = 132`
– `5 8^75 = 134`
– `5 8^76 = 136`
– `5 8^77 = 138`
– `5 8^78 = 142`
– `5 8^79 = 144`
– `5 8^81 = 146`
– `5 8^82 = 148`
– `5 8^83 = 152`
– `5 8^84 = 154`
– `5 8^85 = 156`
– `5 8^86 = 158`
– `5 8^87 = 162`
– `5 8^88 = 164`
– `5 8^89 = 166`
– `5 8^91 = 168`
– `5 8^92 = 172`
– `5 8^93 = 174`
– `5 8^94 = 176`
– `5 8^95 = 178`
– `5 8^96 = 182`
– `5 8^97 = 184`
– `5 8^98 = 186`
– `5 8^99 = 192`
– `5 8^{11} = 248`
– `5 8^{12} = 256`
– `5 8^{13} = 264`
– `5 8^{14} = 272`
– `5 8^{15} = 284`
– `5 8^{16} = 296`
– `5 8^{17} = 312`
– `5 8^{18} = 324`
– `5 8^{19} = 336`
– `5 8^{21} = 364`
– `5 8^{22} = 376`
– `5 8^{23} = 396`
– `5 8^{24} = 416`
– `5 8^{25} = 436`
– `5 8^{26} = 456`
– `5 8^{27} = 476`
– `5 8^{28} = 496`
– `5 8^{29} = 516`
– `5 8^{31} = 536`
– `5 8^{32} = 556`
– `5 8^{33} = 576`
– `5 8^{34} = 596`
– `5 8^{35} = 616`
– `5 8^{36} = 636`
– `5 8^{37} = 656`
– `5 8^{38} = 676`
– `5 8^{39} = 696`
– `5 8^{41} = 716`
– `5 8^{42} = 736`
– `5 8^{43} = 756`
– `5 8^{44} = 776`
– `5 8^{45} = 796`
– `5 8^{46} = 816`
– `5 8^{47} = 836`
– `5 8^{48} = 856`
– `5 8^{49} = 876`
– `5 8^{51} = 996`
– `5 8^{52} = 1116`
– `5 8^{53} = 1136`
– `5 8^{54} = 1156`
– `5 8^{55} = 1176`
– `5 8^{56} = 1196`
– `5 8^{57} = 1216`
– `5 8^{58} = 1236`
– `5 8^{59} = 1256`
– `5 8^{61} = 1276`
– `5 8^{62} = 1296`
– `5 8^{63} = 1316`
– `5 8^{64} = 1336`
– `5 8^{65} = 1356`
– `5 8^{66} = 1376`
– `5 8^{67} = 1396`
– `5 8^{6