To find area $ A $ use formula:
$$ A = a \cdot h $$After substituting $ a = \frac{ 6453 }{ 250 } $ and $ h = \frac{ 679 }{ 50 } $ we have:
$$ A = \frac{ 6453 }{ 250 } \cdot \frac{ 679 }{ 50 } $$$$ A = \frac{ 6453 }{ 250 } \cdot \frac{ 679 }{ 50 } $$$$ A = \frac{ 4381587 }{ 12500 } $$