Everything in math comes down to calculus

Everything else is a generalization. Take, for example, the formula for the area of a rectangle:
Area=lw

In reality, this is the result of the equation:

int_{0}^{w}l,dx=lw

Where the length of the rectangle lies along the y-axis, and the width along the x-axis

See? Isn’t that simple, and a much more accurate representation of the area of a rectangle?

I thought so.