What is the quotient of subtracting 800 from 900 and dividing by 4?
900减去800的差，再除以4，商是多少？
<gadget id="calculator">900 - 800</gadget>
<output>100</output>

<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<result>25</result>