Can someone explain this factorial exercise to me step by step? Risc-v in Rars simulator

Question

.data

.text
.globl main

main:
li a0, 5

jal fact

li a7, 1
ecall
li a7, 10
ecall

fact:
li t0, 2
bge a0, t0, else 
li a0, 1
jr ra

else:
addi sp, sp, -8
sw a0, 4(sp)
sw ra, 0(sp)
addi a0, a0, -1
jal fact
lw t0, 4(sp)
mul a0, a0, t0
lw ra, 0(sp)
addi sp, sp, 8
jr ra

Could I have a detailed explanation of what happens in each cycle? Thanks.