After subtracting how many consecutive 0.24s from 9.6, 2.4 remains.
从9.6中连续减去多少个0.24后，还剩下2.4．
<gadget id="calculator">9.6 - 2.4</gadget>
<output>7.2</output>

<gadget id="calculator">7.2 / 0.24</gadget>
<output>30</output>

<result>30</result>