The base of a triangular plank is 25cm long and the height is 15cm. There are 100 such planks. How many square meters do they have in total?
一个三角形木板的底边长25cm，高15cm，这样的木板共100块，它们的面积共有多少平方米？
<gadget id="calculator">15 / 2</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">100 / 10_000</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">25 * (15/2) * (1/100)</gadget>
<output>15/8 = around 1.875</output>

<result>15/8 = around 1.875</result>