The equation 47 * 36 is 1692.
To do this on paper, make a 2x2 square and have the tens and ones of the both digits on the outside like this.
Then simply multiply in each of the 4 boxes, for example at the top left box multiply 30 * 40.
Once you have done all the multiplying, add all the numbers in the boxes together.
(30 * 40) + (30 * 7) + (6 * 40) + (6 * 7) = 1692
1200 + 210 + 240 + 42 = 1692