5 digits Calculator

im still waiting for my brother coz he went to a vacation and he bring our laptop with him where i put the project. and proteus is intalled there.
i encounter that problem too sir. i just open the project in proteus and then edit the code then compile it again then it work sir!
is it possible to get higher results using assembly? higher than 65,000 sir?

higher maths in assembly is doable but not easy. Check our code section for mathematics code snippets.
http://www.8051projects.net/download-c31-mathematics.html

I would still suggest you go for C Language.

i want to, but the problem sir im not good at C!
i understand basic C but doing higher math in C is hard for me.

can you give me an example sir of multiplying 5 digit x 5 digit numbers and then print it LCD

Download math library routines from here: http://www.8051projects.net/download-d47-math-library.html
use 32x16 bit multiply routine, and print result on display, before printing you need to convert the 4-byte hex result into decimal BCD before displaying it. See example of the same in this project:
http://www.8051projects.net/download-d221-frequency-counter-using-at89c2051-lcd-assembly.html

Give a start.. we will help you move ahead.

By the way, Its the right time for you to start learning C. Its the basis of modern embedded systems.