{"pre_text": ["changes in our performance retention awards during 2009 were as follows : shares ( thous. ) weighted-average grant-date fair value ."], "post_text": ["at december 31 , 2009 , there was $ 22 million of total unrecognized compensation expense related to nonvested performance retention awards , which is expected to be recognized over a weighted-average period of 1.3 years .", "a portion of this expense is subject to achievement of the roic levels established for the performance stock unit grants .", "5 .", "retirement plans pension and other postretirement benefits pension plans 2013 we provide defined benefit retirement income to eligible non-union employees through qualified and non-qualified ( supplemental ) pension plans .", "qualified and non-qualified pension benefits are based on years of service and the highest compensation during the latest years of employment , with specific reductions made for early retirements .", "other postretirement benefits ( opeb ) 2013 we provide defined contribution medical and life insurance benefits for eligible retirees .", "these benefits are funded as medical claims and life insurance premiums are plan amendment effective january 1 , 2010 , medicare-eligible retirees who are enrolled in the union pacific retiree medical program will receive a contribution to a health reimbursement account , which can be used to pay eligible out-of-pocket medical expenses .", "the impact of the plan amendment is reflected in the projected benefit obligation ( pbo ) at december 31 , 2009 .", "funded status we are required by gaap to separately recognize the overfunded or underfunded status of our pension and opeb plans as an asset or liability .", "the funded status represents the difference between the pbo and the fair value of the plan assets .", "the pbo is the present value of benefits earned to date by plan participants , including the effect of assumed future salary increases .", "the pbo of the opeb plan is equal to the accumulated benefit obligation , as the present value of the opeb liabilities is not affected by salary increases .", "plan assets are measured at fair value .", "we use a december 31 measurement date for plan assets and obligations for all our retirement plans. ."], "table": [["", "shares ( thous. )", "weighted-averagegrant-date fair value"], ["nonvested at january 1 2009", "873", "$ 50.70"], ["granted", "449", "47.28"], ["vested", "-240 ( 240 )", "43.23"], ["forfeited", "-22 ( 22 )", "53.86"], ["nonvested at december 31 2009", "1060", "$ 50.88"]], "table_ori": [["", "Shares (thous.)", "<i>Weighted-Average</i><i>Grant-Date Fair Value</i>"], ["Nonvested at January 1, 2009", "873", "$ 50.70"], ["Granted", "449", "47.28"], ["Vested", "(240)", "43.23"], ["Forfeited", "(22)", "53.86"], ["Nonvested at December 31, 2009", "1,060", "$ 50.88"]]}

Question: what is the annual compensation expense for the remaining unvested performance retention awards?
Evidence:
text_1: at december 31 , 2009 , there was $ 22 million of total unrecognized compensation expense related to nonvested performance retention awards , which is expected to be recognized over a weighted-average period of 1.3 years .
Program: multiply(22, const_1000000), divide(#0, 1.3)
Answer:
str_answer: 1692307
exe_answer: 16923076.92308