On the Subject of Foreign Exchange Rates

If bombs were stock brokers...

The top currency is the base, the middle one is the target.

≥ 2 batteries: swap base and target currency.

If buttons are green:

  • Multiply by http://api.exchangeratesapi.io/latest?base=base&symbols=target
  • Round down.
  • Press 2nd most significant digit (1 if zero).
036AUD360IDR608PHP840USD
124CAD376ILS643RUB946RON
156CNY392JPY702SGD949TRY
191HRK410KRW710ZAR975BGN
208DKK458MYR752SEK978EUR
344HKD484MXN756CHF985PLN
348HUF554NZD764THB986BRL
356INR578NOK826GBP

If buttons are red:

Lookup the target currency:

AUD3GBP2KRW1RUB4
BGN7HKD4MXN8SEK5
BRL8HRK9MYR5SGD1
CAD2HUF4NOK7THB6
CHF5IDR6NZD5TRY4
CNY5ILS7PHP1USD4
DKK1INR5PLN8ZAR1
EUR7JPY9RON4