The elder brother and the younger brother deposit both the New Year's money in the bank, and the ratio of their deposits is 7:3. If the elder brother gives his own savings to the younger brother 200 yuan, the ratio of the elder brother's deposits to the younger brother will become 3:2. how much.
哥哥和弟弟把压岁钱都存入银行，两人存款数的比是7：3，如果哥哥把自己的存款给弟弟200元，这时哥哥和弟弟存款数的比就变为3：2，哥哥存款多少元．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) * 200</gadget>
<output>300</output>

<gadget id="calculator">200 + 300</gadget>
<output>500</output>

<gadget id="calculator">(3/2) * 3</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">7 - (9/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">500 / (5/2)</gadget>
<output>200</output>

<gadget id="calculator">200 * 7</gadget>
<output>1_400</output>

<result>1_400</result>