A number plus 50% of it equals (1/2) of 150. Find this number.
一个数加上它的50%等于150的(1/2)，求这个数．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<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">(1/2) / (3/2)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">150 * (1/3)</gadget>
<output>50</output>

<result>50</result>