210×10

210 × 10 equals 2,100. It represents multiplying 210 by ten, i.e., increasing it tenfold.

In base-10 arithmetic, multiplying by 10 shifts each digit one place to the left and adds a trailing zero, so 210 becomes 2100.

Equivalent expressions include 210 × 10 = (21 × 10) × 10 = 21 × 100 = 2,100. In scientific notation, the product is 2.1 × 10^3.

Applications of multiplying by 10 are common in scaling values in everyday calculations, such as price methods, measurements, and area problems. It also illustrates the place-value system and how powers of ten modify magnitude.