A right-angled triangle, the two right-angled sides are 4m and 3m respectively, what is its area?
一个直角三角形，两条直角边分别是4m和3m，它的面积多少㎡．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">4 * (3/2)</gadget>
<output>6</output>

<result>6</result>