if the perimeter of a rectangular house is 1400 m, its length when its breadth is 300 m is?  Choose the correct choice from the following answers:
A) 300 B) 400 C) 500 D) 600 E) 700
<gadget id="calculator">1_400 / 2</gadget>
<output>700</output>

<gadget id="calculator">700 - 300</gadget>
<output>400</output>

<result>B</result>
if the perimeter of a rectangular house is 1400 m, its length when its breadth is 300 m is?
subtract(divide(1400, const_2), 300)
2 ( l + 300 ) = 1400 = > l = 400 m answer : b