请教一道题，计算future value 

[size=2][font=Tahoma, Verdana, sans-serif][/font][/size][table][tr][td][font=CGTimes] Kenyan deposit 40 dollars into the saving account every week. The market rate of interest is j52 = 10%. How much will Kenyan have at the end of one year if he deposits his earnings into a savings account (earning j52 = 10%) at the end of each week? [/font][font=CGTimes] [/font] [font=CGTimes] [/font] [font=CGTimes]以前做过的，现在忘记了，求formula 求答案，感谢！[/font][/td][/tr][/table]

很简单么，你有计算器一下子就出来了pmt=40 n=52 i=10/52 pv=0. fv一下子就出来了