piece of trapezoidal land has the same area as a piece of parallelogram land. The upper base of the trapezoid is 40 meters, the lower base is 64 meters, and the height is 60 meters. The base of the parallelogram is 52 meters. How many meters is the height?
一块梯形土地与一块平行四边形土地面积相等，梯形的上底是40米，下底是64米，高是60米，平行四边形土地的底是52米，高是多少米？
<gadget id="calculator">40 + 64</gadget>
<output>104</output>

<gadget id="calculator">60 / 2 / 52</gadget>
<output>15/26 = around 0.576923</output>

<gadget id="calculator">104 * (15/26)</gadget>
<output>60</output>

<result>60</result>