Add 24 to 12, subtract 20; add 24, subtract 20; if this goes on, at least how many operations can be done to get 100.
12加上24，减20；再加上24，再减20；如此下去，至少经过多少次运算才能得到100．
<gadget id="calculator">100 - 12 - 24</gadget>
<output>64</output>

<gadget id="calculator">24 - 20</gadget>
<output>4</output>

<gadget id="calculator">64 / 4</gadget>
<output>16</output>

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<gadget id="calculator">32 + 1</gadget>
<output>33</output>

<result>33</result>