Please answer the given financial question based on the context.
Context: equipment and energy .
||2013|2012|2011|
|sales|$ 451.1|$ 420.1|$ 400.6|
|operating income|65.5|44.6|62.8|
2013 vs . 2012 sales of $ 451.1 increased primarily from higher lng project activity . operating income of $ 65.5 increased from the higher lng project activity . the sales backlog for the equipment business at 30 september 2013 was $ 402 , compared to $ 450 at 30 september 2012 . it is expected that approximately $ 250 of the backlog will be completed during 2014 . 2012 vs . 2011 sales of $ 420.1 increased 5% ( 5 % ) , or $ 19.5 , reflecting higher air separation unit ( asu ) activity . operating income of $ 44.6 decreased 29% ( 29 % ) , or $ 18.2 , reflecting lower lng project activity . the sales backlog for the equipment business at 30 september 2012 was $ 450 , compared to $ 334 at 30 september 2011 . other operating income ( loss ) primarily includes other expense and income that cannot be directly associated with the business segments , including foreign exchange gains and losses . also included are lifo inventory valuation adjustments , as the business segments use fifo , and the lifo pool valuation adjustments are not allocated to the business segments . other also included stranded costs resulting from discontinued operations , as these costs were not reallocated to the businesses in 2012 . 2013 vs . 2012 other operating loss was $ 4.7 , compared to $ 6.6 in the prior year . the current year includes an unfavorable lifo adjustment versus the prior year of $ 11 . the prior year loss included stranded costs from discontinued operations of $ 10 . 2012 vs . 2011 other operating loss was $ 6.6 , compared to $ 39.3 in the prior year , primarily due to a reduction in stranded costs , a decrease in the lifo adjustment as a result of decreases in inventory values , and favorable foreign exchange , partially offset by gains on asset sales in the prior year. .
Question: considering the year 2013 , what is the sales to operating income ratio?


Answer: The answer is:6.88702