Available On
-
Android Phones
-
Android Tablets
-
iPhones & iPods
-
iPads
Calculate 998 x 997 in less than 5 seconds
Learn techniques to help you calculate faster.
Watch Tutorials
Video tutorials to help you learn fast calculations.
Learn More
Practice Mode
Step-by-step practice to learn each technique.
Learn More
Quiz Mode
Solve without using pen & paper to improve speed.
Learn More