Uncle Zhang used some RMB to buy a one-year bond with an annual interest rate of 10%. Term bond (interest rate unchanged), the principal and interest will be 1320 yuan when it matures. How much did Uncle Zhang spend on this bond?
张叔叔用若干元人民币购买了一种年利率为10%的一年期债券，到期后他取出本金的一半用于购物，剩下的一半及所得的利息又全部买了这种一年期债券(利率不变)，到期共得本息1320元．张叔叔当初购买这种债券花了多少元？
<gadget id="calculator">0.6 * 1.1</gadget>
<output>0.66</output>

<gadget id="calculator">1_320 / 0.66</gadget>
<output>2_000</output>

<result>2_000</result>