level 73 on 100 floors how do u win?

Level 73 of 100 Floors is an interesting math challenge, in which the object is to get 73 (matching the floor number); the solution is as follows:

You can swipe the door in the direction of one of the math equations to add, subtract, multiply, or divide the number in the center of the door.

You start with 0, so swipe to the right to add 20, giving you 20.

Swipe right again to multiply that by 2, giving you 40.

Swipe up to subtract 10, leaving you with 30.

Swipe left to multiply by 3, giving you 90.

Swipe down to divide by 2, leaving you with 45.

Swipe left to add 15, giving you 60.

Swipe down to divide by 4, leaving you with 15.

Swipe right to multiply by 5, giving you 75.

Swipe up to subtract 5, leaving you with 70.

Finally, swipe right to add 3, giving you your goal total of 73, wait a moment, and the door of the elevator will slide open to take you to the next level.

Released in early May, 100 Floors started out with only 30 levels, but the iPhone, iPod, iPad app has gained 50 more through free updates, as well as a port to Android devices since then.