A piece of triangular vegetable is 24 meters long and 15 meters high. There are 720 tomatoes in total. How many tomatoes are planted per square meter?
一块三角形菜地底长24米，高15米，共种西红柿720棵，平均每平方米种西红柿多少棵？
<gadget id="calculator">15 / 2</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">24 * (15/2)</gadget>
<output>180</output>

<gadget id="calculator">720 / 180</gadget>
<output>4</output>

<result>4</result>