The multiplier is 10, the product is 180 more than the multiplicand, what is the multiplicand.
乘数是10，积比被乘数多180，被乘数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">180 / 9</gadget>
<output>20</output>

<result>20</result>