How many consecutive 0.01s are subtracted from 2, leaving 0.5.
从2里面连续减去多少个0.01，还剩下0.5．
<gadget id="calculator">2 - 0.5</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 / 0.01</gadget>
<output>150</output>

<result>150</result>