-4 3/4*(-4/21)

To solve the expression -4 3/4 * (-4/21) in Russian, we need to first convert the mixed number -4 3/4 to an improper fraction.

-4 3/4 as an improper fraction is -19/4.

Next, we multiply -19/4 by -4/21:

-19/4 * -4/21 = (19 * 4) / (4 * 21) = 76 / 84

Now, we simplify the fraction by dividing both the numerator and the denominator by their greatest common divisor, which is 4:

76 / 84 = 19 / 21

Therefore, the result of -4 3/4 * (-4/21) is 19/21 in Russian.