A football field is 105 meters long and 45 meters wide. Xiaoqiang runs 3 laps around the football field, how many meters will he run in total?
一个足球场，长是105米，宽是45米．小强绕这个足球场跑3圈，大约一共要跑多少米？
<gadget id="calculator">105 + 45</gadget>
<output>150</output>

<gadget id="calculator">150 * 2 * 3</gadget>
<output>900</output>

<result>900</result>