A piece of parallelogram glass has a base of 3 meters and a height of 2 meters. It costs 180 yuan to buy this piece of glass. How much is the average per square meter?
一块平行四边形的玻璃，底是3米，高是2米，买这块玻璃一共用去了180元，平均每平方米多少元钱？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

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

<result>30</result>