There are 10 numbers on the telephone number plate, and the seven-digit number system is many times more installed than the six-digit number system.
电话号码盘上有10个号码，采用七位号码制比采用六位号码制装机多多少倍．
<gadget id="calculator">10 ** 7</gadget>
<output>10_000_000</output>

<gadget id="calculator">10 ** 6</gadget>
<output>1_000_000</output>

<gadget id="calculator">10_000_000 / 1_000_000</gadget>
<output>10</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<result>9</result>