The store bought a batch of repeaters, each with a purchase price of 98 yuan and a selling price of 128 yuan. After the sale, the profit was 3600 yuan. How many repeaters are there in total?
商店购进一批复读机，每台进价为98元，售价为128元，售完后盈利3600元，这批复读机共有多少台？
<gadget id="calculator">128 - 98</gadget>
<output>30</output>

<gadget id="calculator">3_600 / 30</gadget>
<output>120</output>

<result>120</result>