Are they refer to same pressure and temperature conditions ("standard")?
1 ft3 = 0.0283168 m3 and 1 MMSCFD equals 28,316.8 Sm3/day or ~1,180 Sm3/hr, so your calculation is correct. Just make sure the result is in standard m3/hr, since you have standard cubic foot as well.
Dejan IVANOVIC
Process Engineer, MSChE