A number increased by 50% is 60, what is this number?
一个数增加它的50%是60，这个数是多少．
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">60 / (3/2)</gadget>
<output>40</output>

<result>40</result>