The school is going to hold a sports meeting. The students in class 51 are going to make a small red flag in the shape of a right triangle with a base of 10 cm and a height of 18 cm to cheer and encourage the class. Class Committee Didi bought a large rectangular piece of red paper, 100 cm long and 72 cm wide. How many small flags like this can they make?
学校要举行运动会，五1班的同学准备每人做一面底是10厘米，高是18厘米的直角三角形状的小红旗为班级加油、鼓劲．班委迪迪买了一大张长方形的红纸，长100厘米，宽72厘米，那么他们能做多少面这样的小旗呢？
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">10 * 9</gadget>
<output>90</output>

<gadget id="calculator">72 / 90</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">100 * (4/5)</gadget>
<output>80</output>

<result>80</result>