The students bought 16 yellow balloons and 20 red balloons. The red balloons cost 2.4 yuan more than the yellow balloons. How much is each balloon?
同学们买16只黄气球、20只红气球，买红气球比黄气球多花2.4元，每只气球多少元？
<gadget id="calculator">20 - 16</gadget>
<output>4</output>

<gadget id="calculator">2.4 / 4</gadget>
<output>0.6</output>

<result>0.6</result>