A rectangular playground is 100 meters long and half as wide as it is long. How many meters is it for Wang Min to run around the playground?
长方形操场长100米，宽是长的一半．王敏绕操场跑一圈是多少米？
<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">100 + 50</gadget>
<output>150</output>

<gadget id="calculator">150 * 2</gadget>
<output>300</output>

<result>300</result>