Subtract 8 from a number, and the result is 0 after 16 consecutive subtractions. How many times is this number 8?
从一个数中减去8，连续减16次后结果是0，这个数是8的多少倍．
<gadget id="calculator">16 / 8</gadget>
<output>2</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>