The cafeteria bought 15 kilograms of eggplants and 15 kilograms of tomatoes, 2.4 yuan per kilogram of eggplants, and 3.6 yuan per kilogram of tomatoes. How much did you spend on the two dishes?
食堂买来茄子和西红柿各15千克，每千克茄子2.4元，每千克西红柿3.6元．买两种菜一共花了多少钱？
<gadget id="calculator">2.4 + 3.6</gadget>
<output>6</output>

<gadget id="calculator">15 * 6</gadget>
<output>90</output>

<result>90</result>