How much is it to combine 138-38=100 and 100/5=20 into one comprehensive formula.
把138-38=100，100/5=20合并成一道综合算式是多少．
<gadget id="calculator">138 - 38</gadget>
<output>100</output>

<gadget id="calculator">100 / 5</gadget>
<output>20</output>

<result>20</result>