How much is it to write 220-180=40 and 40/8 into a formula.
把220-180=40和40/8，写成一个算式是多少．
<gadget id="calculator">220 - 180</gadget>
<output>40</output>

<gadget id="calculator">40 / 8</gadget>
<output>5</output>

<result>5</result>