The base of the red scarf is 100 cm and the height is 30 cm. What is its area in square centimeters?
红领巾的底是100厘米，高是30厘米，它的面积是多少平方厘米？
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">100 * 15</gadget>
<output>1_500</output>

<result>1_500</result>