Combine 24-20=4, 100/4=25, and combine these two formulas into one comprehensive formula.
把24-20=4，100/4=25，这两道算式合并为一道综合算式为多少．
<gadget id="calculator">24 - 20</gadget>
<output>4</output>

<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<result>25</result>