To buy 12 basketballs and 15 volleyballs, the total price is 2400 yuan. The price of 4 basketballs is equal to the price of 5 volleyballs. How much are basketball and volleyball?
买12个篮球，15个排球共付2400元，4个篮球的价格与5个排球的价格相等．求篮球、排球各多少元？
<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">15 + 15</gadget>
<output>30</output>

<gadget id="calculator">2_400 / 30</gadget>
<output>80</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">80 * (5/4) * 12</gadget>
<output>1_200</output>

<result>1_200</result>