custom currency module multiple 0

hi i have created a currency field in a custom module, when i view it it has 5 0’s at the end? any help?

heres an example i need it to say annualcostnew_c 4800.00000 —> 4800

annualcostnew_c
4800.000000

annualcashgainnew_c
1263.060000

currentcarbonnew_c
0.833481

totallightpricenew_c
10993.970000

ledcarbonnew_c
0.271734