piece of triangular cloth with a base of 6 meters and a height of 2 meters. If the price of this piece of cloth is 30 yuan per square meter, how much will it cost to buy this piece of cloth?
一块三角形布，底6米，高2米．如果这块布的价格为每平方米30元，那么买这块布要多少元钱？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">6 * 1 * 30</gadget>
<output>180</output>

<result>180</result>