Two supply and salesmen, A and B, bring the same amount of money to the market to buy materials. A spends 900 yuan, and B spends 80% of the money brought. It is known that the ratio of A’s remaining money to the spent money is 2:3. Ask B How much did you spend?
甲乙两供销员带同样多的钱到市场购材料，甲用去900元，乙用去所带钱的80%，已知甲还剩的钱与用去钱的比是2：3，求乙用去了多少钱？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">900 / (3/5)</gadget>
<output>1_500</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1_500 * (4/5)</gadget>
<output>1_200</output>

<result>1_200</result>