Question: The final stretch of the 2015 Chilean telethon was held at a stadium that has an official capacity of how much?

Context paragraphs:
2002 Chilean telethon: The 2002 Chilean telethon (Spanish: "Teletón 2002") was the 17th Telethon charity campaign held in Chile, which took place 29–30 November 2002.  The theme was ""The Telethon is Yours"," (La Teletón es tuya) due to the complicated economic situation the country was experiencing that year and the lack of a Telethon in 2001 because of the parliamentary election.

2015 Chilean telethon: The 2015 Chilean telethon (Spanish: "Teletón 2015") is the 27th version of the solidarity campaign to be held in Chile, which sought to raise funds for the rehabilitation of children with motor disabilities.  Its slogan was "La hacemos todos" (We do it all).  It was held from the Teatro Teletón from 22:00 on Friday, 27 November until 21:00 on Saturday November 28 and from Julio Martínez National Stadium from 22:00 in its final stretch.  The event ended fulfilling the goal with a final count of CLP30,601,978,621.

2011 Chilean telethon: The 2011 Chilean telethon (Spanish: "Teletón 2011") was the 24th version of this solidarity event in Chile, to raise funds for children's rehabilitation of children with motor disabilities.  The event, which was aired over 27 consecutive hours through the Chilean television channels grouped in the National Television Association (Anatel), was held from Teletón Theatre on December 2 and December 3 and from the National Stadium in its final stage.  The poster child was Isidora Guzmán (aged 6 on 2011), who suffers cerebral palsy.

2003 Chilean telethon: The 2003 Chilean telethon (Spanish: "Teletón 2003") was the 18th version of the charity campaign held in Chile since 1978, which took place on November 21–22, 2003.  As in the previous year the theme of this version was "The Telethon is Yours" ("La Teletón es tuya").  The amount of money taken during the day suggested the goal would not be achieved, in the end it required a cash assistance by the Government of Chile to meet the goal.  The poster boy chosen for the event was Camilo Valverde.

Estadio Nacional Julio Martínez Prádanos: Estadio Nacional Julio Martínez Prádanos (originally known as Estadio Nacional) is the national stadium of Chile, and is located in the Ñuñoa district of Santiago.  It is the largest stadium in Chile with an official capacity of 48,665.  It is part of a 62 hectare sporting complex which also features tennis courts, an aquatics center, a modern gymnasium, a velodrome, a BMX circuit, and an assistant ground/warmup athletics track.

1998 Chilean telethon: The 1998 Chilean telethon (December 4-5, 1988) was the 15th version of the solidarity campaign conducted in Chile.  The theme of this version was ""We All Matter.""  Happily surpassing the target, raising CL$ 6,029,912,577 (Total at 00:57 on December 6, delivered at the National Stadium of Chile).  the poster girl was Scarlett Barrientos.  This edition was performed after 24 months without Telethon, because in December 1997 Chilean parliamentary elections were held.

2016 Chilean telethon: The 2016 Chilean telethon (Spanish: "Teletón 2016") is the 28th version of the solidarity campaign to be held in Chile, which wants to raise funds for the rehabilitation of children with motor disabilities.  It will be held from the Teatro Teletón from 22:00 on Friday, December 2 until 21:00 on Saturday, December 3 and from Julio Martínez National Stadium from 22:00 in its final stretch.  The child symbol or ""ambassador"" of this edition is Vicente Jopia.  Its slogan is "El abrazo de Chile" (The hug of Chile).

2010 Chilean telethon: The 2010 Chilean telethon was the 23rd version of this telethon, the aim this year being to raise funds for the rehabilitation of children with motor disabilities.  The event, which aired over 27 consecutive hours through the Chilean television channels grouped in the National Television Association (Anatel), was held from Telethon Theatre on December 3 and 4 and from the National Stadium in its final stage, and was produced and directed by Mauricio Correa.  The poster child was Cristóbal Galleguillos, born with no upper limbs and malformed legs.  It is the second national telethon after the "Chile helps Chile", aired in March of that year, to be broadcast in HDTV.  This version was performed 2 years after the previous because in December 2009 parliamentary and presidential elections took place.  This was the first telethon to be held during the government of Eduardo Frei Ruiz-Tagle.

1980 Chilean telethon: The 1980 Chilean telethon, the third version of the Chilean Telethon, was conducted in Chile on 5 and 6 December 1980 .  The theme was "Standing hope"and the symbolic boy was José Morales.

2007 Chilean telethon: The 2007 Chilean telethon was the 21st version of the charity campaign held in Chile since 1978.  In this edition, which was conducted between November 30 and December 1, 2007, the slogan was ""You are in every step"" and the poster boy chosen to represent the children helped in the Telethon Foundation was Matías Calderón.

Supporting paragraphs: 2015 Chilean telethon Estadio Nacional Julio Martínez Prádanos
Answer: 48,665