A rectangular swimming pool is 15 meters wide and 4 times as long as it is wide. Xiaogang ran around the swimming pool. How many meters did he run in total?
一个长方形的游泳池宽是15米，长是宽的4倍，小刚围着游泳池跑了一圈，一共跑了多少米？
<gadget id="calculator">15 * 4</gadget>
<output>60</output>

<gadget id="calculator">60 + 15</gadget>
<output>75</output>

<gadget id="calculator">75 * 2</gadget>
<output>150</output>

<result>150</result>