Name the chord shown in the circles

In the surface area formula for cylinders which expressionrepresents the lateral area

The table above shows approximate conversions from gallons to liters. what is the value of x?

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤