There are 3 people in the seasonal fruit shop. Yesterday, they sold 36 boxes of apples, each weighing 15 kilograms, and received a payment of 3240 yuan. How much is an average apple per kilogram?
时令水果店有3人，昨天共售出苹果36箱，每箱15千克，得货款3240元．平均每千克苹果多少元？
<gadget id="calculator">15 * 36</gadget>
<output>540</output>

<gadget id="calculator">3_240 / 540</gadget>
<output>6</output>

<result>6</result>