The glass on a door is 2.25 meters long and 0.8 meters wide. It cost 225 yuan to buy this piece of glass. How much is the average glass per square meter?
一扇门上的玻璃，长是2.25米，宽是0.8米，买这块玻璃花了225元．平均每平方米玻璃多少元？
<gadget id="calculator">2.25 * 0.8</gadget>
<output>1.8</output>

<gadget id="calculator">225 / 1.8</gadget>
<output>125</output>

<result>125</result>