Lin Hua's mother went to the market to buy fruit. She first bought 2.5kg of oranges for 10 yuan, and was going to buy 3kg of apples. The unit price of apples was 1.6 times that of oranges. How much does it cost to buy an apple?
林华的妈妈去市场买水果，她先花10元，买了2.5kg橙子，还准备买3kg苹果，苹果的单价是橙子的1.6倍．买苹果应付多少钱呢？
<gadget id="calculator">10 / 2.5</gadget>
<output>4</output>

<gadget id="calculator">4 * 1.6 * 3</gadget>
<output>19.2</output>

<result>19.2</result>