Xiaohong's father went to the market and sold 4 baskets of duck pears, earning a total of 198 yuan. It is known that each basket of pears weighs 25 kilograms, how much is per kilogram of pears?
小红的爸爸去市场卖了4筐鸭梨，共收入198元．已知每筐鸭梨重25千克，每千克鸭梨多少钱？
<gadget id="calculator">25 * 4</gadget>
<output>100</output>

<gadget id="calculator">198 / 100</gadget>
<output>99/50 = around 1.98</output>

<result>99/50 = around 1.98</result>