Two classes of the sixth grade donated 1,200 yuan for the "Earthquake Relief". The ratio of donations from Class 1 to Class 2 was 5:7. How much more does the second class donate than the first class?
六年级两个班为"抗震救灾"捐款1200元，一班与二班捐款数的比是5：7．二班比一班多捐多少元？
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">1_200 / 12</gadget>
<output>100</output>

<gadget id="calculator">100 * 7</gadget>
<output>700</output>

<gadget id="calculator">100 * 5</gadget>
<output>500</output>

<gadget id="calculator">700 - 500</gadget>
<output>200</output>

<result>200</result>