Problem 40 Champernowne's constant

An irrational decimal fraction is created by concatenating the positive integers:

0.123456789101112131415161718192021…

It can be seen that the 12th digit of the fractional part is 1.

If d_n represents the nth digit of the fractional part, find the value of the following expression.

d₁ × d₁₀ × d₁₀₀ × d₁₀₀₀ × d₁₀₀₀₀ × d₁₀₀₀₀₀ × d_1000000

钱珀瑙恩常数

将所有正整数连接起来构造的一个十进制无理数如下所示：

0.123456789101112131415161718192021… 可以看出小数点后第12位数字是1。

如果d_n表示上述无理数小数点后的第n位数字，求下式的值：

d₁ × d₁₀ × d₁₀₀ × d₁₀₀₀ × d₁₀₀₀₀ × d₁₀₀₀₀₀ × d_1000000

import math

table = []
result = 1
for i in range(1, 10):
    table.append(i * 9 * 10 ** (i - 1))


def process(number):
    point = 1
    while number > sum(table[:point]):
        point += 1
    index = number - sum(table[:point - 1])
    if point == 1:
        return number
    else:
        return eval(str(10**(point - 1) + index / point)[index % point - 1])


for i in range(1, 8):
    result *= process(10 ** (i - 1))

print result

有一种标准的解决问题的编程的感觉，调试了很久