Cut out the largest triangle from a rectangular piece of paper with a length of 10 cm and a width of 7 cm. What is the area of this triangle in square centimeters?
在长10厘米，宽7厘米的长方形纸片中剪去一个最大的三角形，这个三角形的面积是多少平方厘米．
<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">10 * (7/2)</gadget>
<output>35</output>

<result>35</result>