A shopping mall buys a batch of washing machines at a price of 800 yuan, and sells them at a retail price of 965 yuan. When 75% of these washing machines are sold, the shopping mall has made a profit of 9,900 yuan. How many washing machines are there in total in the shopping mall?
某家商场以800元一台的价格购进一批洗衣机，以965元一台的零售价出售．当卖出这批洗衣机的75%时，商场已获利润9900元．问商场购进的这批洗衣机一共有多少台？
<gadget id="calculator">965 - 800</gadget>
<output>165</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">9_900 / 165 / (3/4)</gadget>
<output>80</output>

<result>80</result>