The product of four consecutive positive integers is 840. Find the numbers

Let x be the first number

the next consecutive number would be (x+1)

and the one after would be (x+2)

and the 4th one would be (x+3)

and the product of these 4 numbers equals 840

so

x (x+1) (x+2) (x+3) = 840

and now solve for x