http://imgur.com/gallery/OQrmDNv
The image shows some long division where {26& ÷ %2# = # with no remainder. Put another way, # × %2# = {26&.
The problem is to find the numeric values of the four symbols used: # % { &. Each is a single digit and presumably not one of 2, 6, or 0 (which were written normally), nor is a digit reused with multiple symbols.
The most obvious symbol to start with is #. # × # = & with maybe something carried into the ten's place. Of the 10 digits, 7 are available to try:
- 1 × 1 = 1 (#=1, &=1) - no: it reuses the 1 for two symbols
- 3 × 3 = 9 (#=3, &=9) - possible