The number 20 less than 50% of a number is 36. What is this number?
比一个数的50%少20的数是36，这个数是多少？
<gadget id="calculator">20 + 36</gadget>
<output>56</output>

<gadget id="calculator">56 / 0.5</gadget>
<output>112</output>

<result>112</result>