A rectangular square is 150 meters long and three times as long as it is wide. Grandpa walked 3 times along this square, how many meters did he walk in total?
一个长方形广场长150米，长是宽的3倍．爷爷沿着这个广场走了3圈，一共走了多少米？
<gadget id="calculator">150 / 3</gadget>
<output>50</output>

<gadget id="calculator">150 + 50</gadget>
<output>200</output>

<gadget id="calculator">200 * 2 * 3</gadget>
<output>1_200</output>

<result>1_200</result>