Contact Person: Judy Zhu
Phone:+86-574-87934881
Fax:+86-574-87934888
Address: Rm 6B13-16,Hall 2,Int\'l Trade & Exhibition Center,181 Huizhan Rd,Ningbo 315042,China,Ningbo,Zhejiang
Calculator is a device used to perform both basic operations of arithmetic and complex mathematical operations.