The price of 4 kg of apples and 7 kg of bananas is the same. 1 kg of apples is 1.5 yuan more expensive than 1 kg of bananas. How much is it per kg of apples? (Solution of column equation)
4千克苹果和7千克香蕉的价钱相等，1千克苹果比1千克香蕉贵1.5元，每千克苹果多少元？(列方程解)
<gadget id="calculator">1.5 * 4</gadget>
<output>6</output>

<gadget id="calculator">7 - 4</gadget>
<output>3</output>

<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">2 + 1.5</gadget>
<output>3.5</output>

<result>3.5</result>