## Task 1 - 010821

Steel production in the USSR had increased by about 1640 percent by 1960 compared to 1913 (Tsarist Russia).

In how many days in 1960 was as much steel produced in the USSR as in the entire year of 1913?
The steel production of the USSR in 1960 corresponds to 1640 percent of the annual production of 1913, i.e., the production within 365 days. The entire annual production of 1913, i.e., 100 percent, would then be produced in $100: 1640 \cdot 365$ days $\approx 22$ days in the year 1960.