This document describes the Runge-Kutta method of numerically solving differential equations. It provides the calculations over multiple iterations to find the value of y at x=3 given the initial values of x0=0, y0=1, and xf=3. The k values are calculated at each step using the formula for the Runge-Kutta method. The value of y is then updated using a weighted average of the k values until it converges to a value of around 0.63763 at the final x value of 3.