y axis values show unexpected values in bar chart in crystal report

i have problem with chart graph in crystal report.
 
i am using number type for y axis and here i am doing sum of that field and taken as y axis..
 
that is my chart graph is sum of field1(numeric) v/s field2(date )
 
for example--total sales money v/s date
 
but , y axis values are not printing in integer they are print in some other form like 0.0E+000 ,1.0E+009 and so on. how can i solved it..