When the decimal point of a certain positive decimal number is moved six places to the left, the resulting number is 9 times the

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问题 When the decimal point of a certain positive decimal number is moved six places to the left, the resulting number is 9 times the reciprocal of the original number. What is the original number? ________.

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答案3000

解析 设这个数是x,将x的小数点向左移动6位,则x除以106,得到的数字是x的倒数的9倍,即x/106=9/x,得到x=3000。
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