Mom bought 3.2 kilograms of cherries, gave the salesperson 100 yuan, got back 10.4 yuan, how much is it per kilogram of cherries?
妈妈买了3.2千克的樱桃，交给售货员100元，找回10.4元，每千克樱桃多少元？
<gadget id="calculator">100 - 10.4</gadget>
<output>89.6</output>

<gadget id="calculator">89.6 / 3.2</gadget>
<output>28</output>

<result>28</result>