How much is it to combine 90-20=70 and 70/7=10 into one comprehensive formula.
把90-20=70，70/7=10合并成一道综合算式是多少．
<gadget id="calculator">90 - 20</gadget>
<output>70</output>

<gadget id="calculator">70 / 7</gadget>
<output>10</output>

<result>10</result>