company borrows 400,000 yuan from the bank to develop a new product. It is known that the annual interest rate of the loan is 15% (without compound interest, that is, the interest before repayment is not repeatedly calculated), and the cost of each product is 2.3 yuan , the price is 4 yuan, and the tax payable is 10% of the sales amount. If 200,000 units of this product are produced every year and the profits are used to repay the loan, how many years will it take to pay off the loan at one time?
某公司向银行贷款40万元，用来开发某种新产品，已知该贷款的年利率为15%(不计复利，即还款前利息不重复计息)，每个产品的成本是2.3元，售价4元，应纳税款为销售额的10%，如果每年生产该种产品20万个，并把所得的利润用来还贷款，问几年后才能一次性还清？
<gadget id="calculator">80 - 46 - 8 - 6</gadget>
<output>20</output>

<gadget id="calculator">40 / 20</gadget>
<output>2</output>

<result>2</result>