A parallelogram of glass has a base of 50 cm and a height of 70 cm. Find the area of the glass.
一块平行四边形的玻璃，底是50厘米，高是70厘米．求这块玻璃的面积．
<gadget id="calculator">50 * 70</gadget>
<output>3_500</output>

<result>3_500</result>