Guangming Elementary School donated money for the earthquake disaster in Sichuan. Class 61 donated a total of 2,450 yuan. It is known that the ratio of boys and girls donating is 4:3. How much more do boys donate than girls?
光明小学为四川震灾捐款，六1班共捐款2450元，已知男生和女生捐款数的比是4：3．男生比女生多捐款多少元？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">2_450 * (4/7)</gadget>
<output>1_400</output>

<gadget id="calculator">2_450 - 1_400</gadget>
<output>1_050</output>

<gadget id="calculator">1_400 - 1_050</gadget>
<output>350</output>

<result>350</result>