A fish pond is 30 meters long and exactly 5 times its width. What is its circumference in meters?
一个鱼塘，长30米，正好是宽的5倍，它的周长是多少米？
<gadget id="calculator">30 / 5</gadget>
<output>6</output>

<gadget id="calculator">30 + 6</gadget>
<output>36</output>

<gadget id="calculator">36 * 2</gadget>
<output>72</output>

<result>72</result>