The red scarf is a triangle with a base of 6 decimeters and a height of 2 decimeters. Now we want to make a red scarf for each of the 40 students in the fifth grade. How many square decimeters of red cloth are needed?
红领巾是底是6分米，高是2分米的三角形，现在要给五年级40名同学每人做一条红领巾，一共需要红布多少平方分米？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">6 * 1 * 40</gadget>
<output>240</output>

<result>240</result>