The school bought 7 sets of tables and chairs. The table cost 150.5 yuan and the chairs 93.8 yuan. How much is each table more expensive than each chair?
学校买了7套桌椅，其中桌子共花150.5元，椅子共花了93.8元，每张桌子比每把椅子贵多少元？
<gadget id="calculator">150.5 / 7</gadget>
<output>21.5</output>

<gadget id="calculator">93.8 / 7</gadget>
<output>13.4</output>

<gadget id="calculator">21.5 - 13.4</gadget>
<output>8.1</output>

<result>8.1</result>