multiplying
v.v. increasing a number by adding it to itself a certain number of times. It also means growing quickly in number or amount.
v. performing the mathematical operation of multiplication; increasing significantly in number or quantity through reproduction or accumulation. Present participle of 'multiply'.
The children are practicing multiplying small numbers in class today.
Rabbits are famous for multiplying quickly when they have enough food and no natural predators.
By multiplying the length of the base by the height of the triangle and dividing by two, the students calculated the total area of the geometric shape.
The verb is transitive when used in mathematics and often intransitive when describing biological growth.
The population is multiplying itselfThe population is multiplyingWhen describing growth in numbers, 'multiply' is usually intransitive and does not need a reflexive pronoun.