A company borrowed 6,543,800 yuan from the bank to produce new products. The known annual interest rate of the loan is 654.38+05% (excluding compound interest, that is, the interest before repayment).
Annual profit = 200,000 * (4-1.85-4 *10%) = 350,000 yuan.
Assuming that it takes x years to pay off the loan principal and interest in one lump sum, there are:
1000000+ 1000000 * 15% * X = 350000 * X
100+ 15X=35X
20X= 100
X=5
So it takes five years to pay it off in one lump sum.