Everything I know is wrong!

I'm studying to get my GED and one of these practice problems has me confused.

I have a right triangle:
Sin A = 20 degrees
Opposite C = 4.26ft
Hypotenuse B = ?
Find B.

The formula they gave me looks like a simple division problem, Sin = Opp/Hyp.

Sin is the Quotient, Opp is the Dividend and Hyp is the Divisor.

I was taught long ago, to find the Divisor in a division problem you multiply the Dividend by the Quotient.

So I punched in 4.26 x 20sin into the calculator and get 1.45 (rounded to 1.5) which is wrong.

The correct why, or at least their way, to find the Divisor is to divide the Dividend by the Quotient.

4.26/20sin = 12.45 (round to 12.5).
Which undermines everything I was taught.

I just want to know why the old way doesn't work here.

Just realizing that maybe there's a european convention in mathematics that I'm not (being Amerifag) privy to. Is 20Sin equivalent to sin(20) over there? Here it would mean . . . well, nothing, since there's no angle there to take the Sin of, but 20Sin(x), for example, would be 20 times the Sin of angle x.