Grandpa Zhang exercises his body. He runs twice a day along a rectangular pool that is 40 meters wide and three times as long as it is wide. How many meters does Grandpa Zhang run every day?
张爷爷锻炼身体，每天沿着一个宽40米，长是宽的3倍的长方形水池跑两圈，张爷爷每天跑多少米？
<gadget id="calculator">40 * 3</gadget>
<output>120</output>

<gadget id="calculator">120 + 40</gadget>
<output>160</output>

<gadget id="calculator">160 * 2 * 2</gadget>
<output>640</output>

<result>640</result>