Here's how we get that:

1. Move the decimal point: Start with the number and move the decimal point to the left until you have a number between 1 and 10. In this case, we move it 10 places to the left.

2. Count the moves: The number of places you moved the decimal point is your exponent. Since we moved it 10 places, the exponent is 10.

3. Combine the pieces: The number you obtained after moving the decimal (2.9678900522) is multiplied by 10 raised to the power of the exponent (10).